Valve-gear.



No. 857,579. I PATENTED JUNE zs 1907.

J'. O. BIRD.-

VALVE GEAR. APPLIGATIOIT FILED BEPT.16.1906.,

BSHEETS-SHEET 1. A

No. s57,579. PATENTED JUNE 25, 1907'. J. 0.31m).

VALVE GEAR.

PLI ATION FILED SEPT.15,1 AP 0 905 a sums-sum 2.

Q M #Qmj} lgvergto'rg Witnesses;

PATENTED JUNE 25, 1907.

J. c. BIRD. VALVE GEAR APPLIOATION FILED BEPT.15. 1905.

a SHEETSr-SKEBT s.

Witgesses: I 45; M 0% UNITED sTAT s PATENT 'oEEIoE.

JOHN o. BIBB, or BATTLE CREEK, MICHIGAN, 'ASSIGNOR To UNION s EAM PUMPCOMPANY, or BATTLE CREEK, MICHIGAN;

.VALVE-GEAFI.

Application filed September 15, 1905. Serial No. 278,653.

To all whom it rrvay concern; 1

mprovements' in Valve-Gear, of which the following is a specification.

This invention relates to improvements in.

valve gear.

My improved valve gear is articularly adapted for use'on a pair of singe pumping engines, and I have illustrated the same adapted theretoalthough it is advantageous for use in other relations.

The objects of this invention are, first, to

provide an improved valve gear for duplex- 1 mg a pair of single engineswhereby their relative movement is controlled or timed and theshort-stroking of one by the other reduced to a minimum. Second, toprovide an improved valve gear for duplexing a pair of singleindependent engines by means of which either of the engines may bethrown out of operation,'the other remalning in operation. Third, toprovide an improved valve gear which is simple in structure and notlikely to get out of repair.

Further objects, and objects relating to H I structural details, willdefinitely appear from 1 vention.

the detailed description to follow.

I accomplish the objects of my invention by the devices and meansdescribed in the following specification. I

The invention is clearly defined anld pointed out in the claims. i

A structure embodying the features of my invention is clearlyillustrated in the accompanying drawing forming a part of thisspecification, in which, j

Figure 1 is a detail side elevation view of a structure embodying thefeatures of my in Fig. 2 1s a detail plan view thereof.

Fig. '3 is an eniarged detail side elevation view, showing theconnections and arrange-.

ment of the parts for operating the valves.

Fi I 4 is an enlarged detail. sectional view ta en on a linecorresponding to line 44 of Fig. 3. showing the structure of thecouplingfor the synchronizing bar to the piston rod. Fig. 6 is a detailsectional view taken on aline cor responding to line 6 6 of Fig. 5.Figs. 7, 8,

- 9, and were diagrammatic'views showing theoperation of the valve gear.

Specification of Letters Patent.

Fig. 5 is a detail side elevation view Patented June 25,1907.

In the drawings the sectional views are taken looking in the directionof the little arrows at the ends of the section lines, andsimilarfletters of reference refer to similar parts throughout theseveral views.

the engine cylinders. These cylinders are provided with suitable valves,the details of which are not here illustrated as they form no part ofthis invention.

B B represent thepumps. The cylinders A and the pumps B are connected bythe tie rods 0, preferably four to each cylinder and pump.

5 D D are the piston rods.

Valve stems H H project toward the ump ,piylinders and are operatedbythe rock evers i These 'rock levers E are pivoted on E the brackets Gby suitable pivot pins e.. The. lheads e of the rock levers projectbetween the tappets H of the valve stem, so that as jthe lever is rockedthe valve is shifted. The lever E is arranged through the couplingsleeve ,E- which is secured by the pivot e to the sleeve E which isslidably mounted on one of the lower tie-rods C. The sleeve E is shiftedby the synchronizing bar F, which is connected thereto by the couplingsleeve f through which the bar is arranged, the coup- .ling sleeve fbeing secured'by the pivot f to the sleeve E. l i

The bar F is operated by the piston rods D, the bar being connectedthereto b the brackets D on the piston rods. The ar F is secured to thebrackets hy means of the coupling sleeves F through which it is ar-.ranged. The sleeves F are secured to the brackets by the pins d. Thismechanism is duplicated for each pump, so that, as the synchronizing baris carried back and forth by the iston rods, the valve stems are.shifted t ough the connections described.

When it is desired to throw one of the .engines out of operation thesleeve F of that pump is disconnected from the piston rod by withdrawingthe pin (1 from the bracket D andsecuring' the sleeve by the pin d tothe bracket D on one of the tie rods. By thus disconnecting one end ofthe bar E from one of the. piston rods, its movement is so limited thatit does not actuate the valve of that engine, although the other enginemay still operate. The sleeves F are, for convene Referring to thedrawings, A A representfic ience i-n manipulation, made in the form ofscrew f is provided. secures the rod to one of the sleeves and al lowsit to slip within the others.

handles, as is illustrated. For convenience in-manipulating the pin (1,it is preferably means of the stud d on the pin which is ar-' ranged inthe slot D The seat 1 is formed at the upper end of the slot to receivethe stud (1, whereby the pin d-is locked in its upper position. Toprevent the rod F slip- P (See Fig. 4.) W This arranging the parts,the'valvemechanism of each engine is operated largely by the engineitself, and not byits neighbor, as is customary in duplex engines, theaction of one an glue on the valve of its neighbor being only sufiicienttokeep the pumps in step.- This reducesthe possibility of one cylinder.shortstroking the opposite cylinder to a minimum. This short-strokingisgenerally due to the fact that one engine or limp is packed looser thanthe other, in W 'ch event, other things being equal, the piston of oneo'f the pumps will move somewhat faster than the other. By my improvedvalve gear the pumps are kept in step, and this is true, no matter whatthe position of the pistons may be when starting the pumps, as after oneor two strokes, the pumps get into step and remain in step, one of thepumps always leadin the other.

the diagrammatic views of Figs. 7, 8, 9, and 10, the positions of thesynchronizing bar of the valve gear are illustrated. InFig. 7, one oftheengmes is at the reversing point, and in Fig. 8, the other. In Figs. 9and 10 the reversing at the opposite end of the stroke is illustrated. ia

As previously stated, by my improved valve gear the enginesare'operated, and the liability of one short-stroking the other redacedtov a minimum. .It is evident from the fore oing description that one ofthe enginescan be stop ed for the purpose of repair or the like, an theother continue its operation and thesame again connected and operated toether very quickly and easily.

have illustrated and desoribedmy imroved valve gear in detailin the formpreiiarred by me on account of its structural sini plicity andconvenience in operation, al-' though I am aware that it is capable ofconsiderable variation in structural details with.- out departing frommy invent1on.

Having thus described my invention, what I I claim as new and desire tosecure by Letters Patent, is: I 1. The combination w1th a pair of enginecylinders of a pair of pum s tierods for said cylinders and pumps; va vestems; pivoted levers for actuating said valve stems, said valve stemshaving tappets arranged tobe engaged by said levers a pair of sleevesslidstatue from-the sleeves f and F", a pin or set,

By thus ably. mounted upon said tie rods; sleeves through which saidlevers are arranged, pivotally mounted on said sliding sleeves; asynchronizing bar; sleeves through which said bar is arranged, pivotallymounted on said sliding sleeves; piston rods; brackets onsaid pistonrods; sleeves through which said syn chronizing bar is arranged,pivotally mounted on said brackets; and brackets on said tierods, towhich said last named sleeves may be pivotally secured whendisconnected, for the purpose specified.

2. The combination with a pairlof engine cylinders of apair of pum s;tie-rods for said cylinders and pumps; va ve stems; pivoted levers foractuating said valve stems, said valve stems having tappets arranged tobe enga ed by said levers; a pair of sleeves slid-f ably mounted? uponotally mounted on said sliding sleeves a synchronizing bar; sleevesthrough which said bar is arranged, pivotally mounted-on said slidingsleeves; iston' rods; brackets on said piston rods; an sleeves throughwhich said synchronizing bar is arranged, pivotally mounted on saidbrackets, for the purpose specified. i 3. The combinationwith a pair ofengine cylinders of a pair of'pum s; tie-rods for said cylinders andpumps; va ve stems; pivoted levers for actuating said valvestems; a pair'of sleeves slidalily mounted uponsaid. tie f rods; sleeves throughwhich said levers are arranged, pivotally mounted on saidslidingsleeves; a synchronizing bar sleeves through v said tie rods; sleevesthrough which said levers are arranged, piv- Inc which said bar is"arranged, pivotally mounted on said sliding sleeves piston rods;sleeves through which said synchronizing bar is arranged, ivotallyconnected to said piston rods; an brackets on said tie-rods, to whichsaid last named sleeves may be pivotally secured when disconnected, forthe ,purpose specified. l

4. The combination with a pair of engine cylinders of a pair of pum stie-rods for said cylinders and pumps; va ve stems; pivoted levers foractuating said'valve stems; a pair of sleeves slidably mounted upon saidtierods; sleeves through which said levers are arranged, pivotallymounted on said sliding sleeves; a synchronizing bar; sleeves throughwhich said bar is arranged, pivotally mounted on said sliding sleeves;piston rods; and sleeves through which said synchronizing bar is arraned, ivotally connected to said piston rods, Tor t e purpose specified.

5. The combination with a pair of engine cylinders of the piston rods;valve stems; pivoted I levers for actuatin said valve 'sleeves throughwhich said levers are are 12 5 stems; a pair of reciprocating members y,

ranged, pivotally mounted on said recipro- I eating members; a schronizing bar sleeves through which said ar is arranged, pivotally.mounted on said reciprocating members;

sleeves through which said synchronizing bar is arranged, detachablysecured. to said piston rods by pivot pins; and means by 'which saidlast named sleeves may be pivrods, for the purpose specified.

-7. The combination with a air of engine cylindersof'the piston rods anvalve stems; a pair of reciprocating members for actuating said valvestems; a synchronizing bar; sleeves through which said'bar is arranged,pivotally mounted on said reciprocating members; sleeves through whichsaid synchronizing bar is arranged, cdetachably secured to said pistonrodsfby pivot pins; and means by which said last named sleeves may bepivotally supported when disconnected ffirom said piston rods, for thepurpose speci- 8. The combination with a air of engine cylinders of thepiston rods and valve stems; a pair of reciprocating members foractuating said valve stems; a synchronizing bar; sleeves through whichsaid bar is arranged,

.from said pivotally mounted on said reciprocating.

members; sleeves through which said synchronizing bar is arranged,pivotally secured to said piston rods, for the purpose specified.

9. The combination with a air of engine cylinders of the iston rods andvalve-stems; a synchronizing ar; means controlled thereby for actuatingsaid valve stems sleeves through which said synchronizing bar isarranged, detachably secured to said iston rods bypivot ins; and meansby whic said sleeves may e pivotally supported when disconnected fromsaid piston rods, for the purpose specified.--

10. The combination with a air of engine cylinders of the iston rods andvalve stems; a synchronizing ar; means controlled thereby for actuatinsaid valve stems; and sleeves through w ich said synchronizing bar isarranged, pivotally secured to said piston rods, for the-purposespecified 1 1. The combination with a air of engine cylinders of theiston rods an valve stems; a synchronizlng ar; means controlled therebyfor actuating said valve stems; means for pivotally securing said bar tosaid piston rods and means for pivotally supportin either end-of saidbar when disconnecte piston rods, for thepurpose speci- In witnesswhereof, I have hereunto set my hand and seal'in the presence of twowitnesses.

, JOHN C. BIRD. [L. 8.]

Witnesses: I i

O. W. BRAINARD, F. J. BROGEN.

